chromium/third_party/blink/web_tests/external/wpt/css/css-pseudo/selection-input-011.html

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Pseudo-Elements Test: active selection and input type="text" element</title>

  <link rel="author" title="GĂ©rard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
  <link rel="help" href="https://www.w3.org/TR/css-pseudo-4/#highlight-selectors">
  <link rel="match" href="reference/selection-input-011-ref.html">
  <!-- Allow different antialiased pixels on the focus ring. -->
  <meta name="fuzzy" content="0-5;0-255">

  <style>
  input
    {
      background-color: red;
      color: yellow;
      font-family: monospace;
      font-size: 48px;
      line-height: 56px;
      padding: 0px;
      width: 13ch;
    }

  input::selection
    {
      background-color: yellow;
      color: green;
    }
  </style>

  <script>
  function startTest()
  {
  document.getElementById("test").select();
  }
  </script>

  <body onload="startTest();">

  <p>Test passes if each glyph of "Selected Text" is green with a yellow background and if there is <strong>no red</strong>.

  <div><input type="text" value="Selected Text" id="test"></div>